Running open-loop at all times. ok or bad idea?
#1
Running open-loop at all times. ok or bad idea?
I shall explain myself further on if I need to, but just to keep the question simple;
is it a bad idea if I set MS to open-loop 100% of the time?
I have a MSPNP 9495 running Hires 10g.
I have my VE and spark tables to what I am happy with.
If it is not a bad idea, what is the safest way to do it?
What I was thinking of doing, without changing any settings in the configurator, is to change the following parameteres in EGO settings under "basic settings" tab:
- Controller step size: set to 0%
- Controller authority: set to 0%
- active above coolant temp: set to something unreachable like 250degrees Fahrenheit
- 'active above RPM': set it to over 8,000RPM
Any advice and criticism, preferably constructive, muchly appreciated
Cheers
Andrew
PS: fuel economy is NOT an issue
PPS: my engine is only a mildly tuned naturally aspirated BP (NA8) with stock internals
is it a bad idea if I set MS to open-loop 100% of the time?
I have a MSPNP 9495 running Hires 10g.
I have my VE and spark tables to what I am happy with.
If it is not a bad idea, what is the safest way to do it?
What I was thinking of doing, without changing any settings in the configurator, is to change the following parameteres in EGO settings under "basic settings" tab:
- Controller step size: set to 0%
- Controller authority: set to 0%
- active above coolant temp: set to something unreachable like 250degrees Fahrenheit
- 'active above RPM': set it to over 8,000RPM
Any advice and criticism, preferably constructive, muchly appreciated
Cheers
Andrew
PS: fuel economy is NOT an issue
PPS: my engine is only a mildly tuned naturally aspirated BP (NA8) with stock internals
#4
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I ran open loop for the last year, and only went to closed loop for emissions.
I would never run closed loop in boost, but there's really no downside to allowing correction at cruise, assuming the target is what you've actually tuned your ve table for.
I would never run closed loop in boost, but there's really no downside to allowing correction at cruise, assuming the target is what you've actually tuned your ve table for.
#5
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You don't need to do all of those to turn it off. Any one of them would be sufficient. I just set the authority to 0 and leave everything else, so if I want to re-enable EGO correction I only have to change one number back.
#10
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Hopefully I am right here but here goes:
In Open loop the ECU bases fueling on the data in your fuel tables with no regard for what your actual AFR is. No O2 sensor input
In Closed loop the ECU uses your fuel table and data from your O2 sensor to adjust fuel to match your AFR targets.
In Open loop the ECU bases fueling on the data in your fuel tables with no regard for what your actual AFR is. No O2 sensor input
In Closed loop the ECU uses your fuel table and data from your O2 sensor to adjust fuel to match your AFR targets.
#11
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I'm drunk, so excuse the absurd pre-school style conversations.
open loop
ECU: Sup O2 sensor.
O2 sensor: Sup ECU. You're a little too lean.
ECU: No **** you O2 sensor.
closed loop
ECU: Sup O2 sensor.
O2 sensor: Sup ECU. You're a little too lean.
ECU: OK, we'll add some fuel to that ****.
O2 sensor. C00l.
open loop
ECU: Sup O2 sensor.
O2 sensor: Sup ECU. You're a little too lean.
ECU: No **** you O2 sensor.
closed loop
ECU: Sup O2 sensor.
O2 sensor: Sup ECU. You're a little too lean.
ECU: OK, we'll add some fuel to that ****.
O2 sensor. C00l.
#12
I'm drunk, so excuse the absurd pre-school style conversations.
open loop
ECU: Sup O2 sensor.
O2 sensor: Sup ECU. You're a little too lean.
ECU: No **** you O2 sensor.
closed loop
ECU: Sup O2 sensor.
O2 sensor: Sup ECU. You're a little too lean.
ECU: OK, we'll add some fuel to that ****.
O2 sensor. C00l.
open loop
ECU: Sup O2 sensor.
O2 sensor: Sup ECU. You're a little too lean.
ECU: No **** you O2 sensor.
closed loop
ECU: Sup O2 sensor.
O2 sensor: Sup ECU. You're a little too lean.
ECU: OK, we'll add some fuel to that ****.
O2 sensor. C00l.
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